Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Changes in Level 3 Portfolio (Details)

v3.23.2
Fair Value Measurements - Changes in Level 3 Portfolio (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
First lien debt        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance $ 5,774,333 $ 840,223 $ 4,882,393 $ 0
Purchases of investments 431,483 1,365,064 1,292,886 2,261,818
Proceeds from principal repayments and sales of investments (138,977) (37,008) (169,558) (92,381)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 (4,714) 0
Ending balance 6,104,163 2,154,718 6,104,163 2,154,718
Net change in unrealized appreciation (depreciation) related to financial instruments still held 26,888 (15,296) 84,064 (17,227)
First lien debt | Accretion (Amortization) of Discounts and Premiums, Investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 7,621 1,738 15,602 2,497
First lien debt | Debt and Equity Securities, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 1,853 (3) 960 11
First lien debt | Debt and Equity Securities, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 27,850 (15,296) 86,594 (17,227)
Second lien debt        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance 18,048 0 8,794 0
Purchases of investments 1,879 8,776 1,879 8,776
Proceeds from principal repayments and sales of investments 0 0 0 0
Transfers into Level 3 0 0 9,463 0
Transfers out of Level 3 0 0 0 0
Ending balance 20,039 8,780 20,039 8,780
Net change in unrealized appreciation (depreciation) related to financial instruments still held 86 1 (156) 1
Second lien debt | Accretion (Amortization) of Discounts and Premiums, Investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 25 3 58 3
Second lien debt | Debt and Equity Securities, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 0 0 0 0
Second lien debt | Debt and Equity Securities, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 87 1 (155) 1
Unsecured debt        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance 1,915   1,606  
Purchases of investments 66   443  
Proceeds from principal repayments and sales of investments 0   0  
Transfers into Level 3 0   0  
Transfers out of Level 3 0   0  
Ending balance 1,975   1,975  
Net change in unrealized appreciation (depreciation) related to financial instruments still held 14   (65)  
Unsecured debt | Accretion (Amortization) of Discounts and Premiums, Investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings (19)   (10)  
Unsecured debt | Debt and Equity Securities, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 0   0  
Unsecured debt | Debt and Equity Securities, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 13   (64)  
Equity investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance 2,469 67 2,306 0
Purchases of investments 2,334 0 2,913 67
Proceeds from principal repayments and sales of investments (125) 0 (177) 0
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Ending balance 4,729 67 4,729 67
Net change in unrealized appreciation (depreciation) related to financial instruments still held 102 0 91 0
Equity investments | Accretion (Amortization) of Discounts and Premiums, Investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 0 0 0 0
Equity investments | Debt and Equity Securities, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings (49) 0 (402) 0
Equity investments | Debt and Equity Securities, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 100 0 89 0
Investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance 5,796,765 840,290 4,895,099 0
Purchases of investments 435,762 1,373,840 1,298,121 2,270,661
Proceeds from principal repayments and sales of investments (139,102) (37,008) (169,735) (92,381)
Transfers into Level 3 0 0 9,463 0
Transfers out of Level 3 0 0 (4,714) 0
Ending balance 6,130,906 2,163,565 6,130,906 2,163,565
Net change in unrealized appreciation (depreciation) related to financial instruments still held 27,090 (15,295) 83,934 (17,226)
Investments | Accretion (Amortization) of Discounts and Premiums, Investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 7,627 1,741 15,650 2,500
Investments | Debt and Equity Securities, Realized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings 1,804 (3) 558 11
Investments | Debt and Equity Securities, Unrealized Gain (Loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Gain (loss) included in earnings $ 28,050 $ (15,295) $ 86,464 $ (17,226)